let uuid = ()=> {
    let s = [];
    let hexDigits = "0123456789abcdef";
    for (let i = 0; i < 36; i++) {
        s[i] = hexDigits.substr(Math.floor(Math.random() * 0x10), 1);
    }
    s[14] = "4"; // bits 12-15 of the time_hi_and_version field to 0010
    s[19] = hexDigits.substr((s[19] & 0x3) | 0x8, 1); // bits 6-7 of the clock_seq_hi_and_reserved to 01
    s[8] = s[13] = s[18] = s[23] = "-";

    let uuid = s.join("");
    return uuid;
}
let obj2Params = (data)=>{
    let dataStr = '';
    Object.keys(data).forEach(key => {
        dataStr += key + '=' + data[key] + '&';
    });
    return dataStr
}
let fileSuffix = (file) =>{
    let fileLen =file.lastIndexOf(".");
    let len = file.length;
    return file.substring(fileLen,len);
}
export const ComUtils = {
    fileSuffix:fileSuffix,
    obj2Params:obj2Params,
    uuid:uuid
}